Improvement in machines for laying out mortises



PATENT OFFICE.

JACOB M..RODKEY, OF INDIANA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR LAVING OUT MORTISES.

Specication forming part of Letters Patent No. 117,334, dated July 25, 1871.

To all 'whom it may concern:

Be it known that I, JACOB M. RCDKEY, of Indina, in the county of Indiana and in the State of Pennsylvania, have invented an Improved Machine for Laying out Mortises, &c., on Window-Sashes; and do hereby declare that the following description, taken in connection with the accompanying drawing hereinafter referred to, forms a full and exact specification of the same, wherein I have set forth the nature and principles of my said improvement, by which my invention may be distinguished from others of a similar class, together with such parts as I claim and desire to secure by Letters Patent.

My invention relates to machines made use of for the purpose of laying out mortises in windowsashes; and the nature thereof consists in certain modifications in the details ofthe construction of the same, hereinafter fully described and shown.

In the accompanying dra win g, which illustrates my invention and forms a part of the specication thereof, Figure 1 is a view of the machine in perspective. Fig. 2 is a detached and enlarged View of the marking-bit.

The construction and relative arrangement of the component parts of my invention are as fol-4 lows, to wit: In the drawing referred to, A and A designate the beams to which the markingbits B and B are attached. The upper beam A is provided with the longitudinal slot or aperture a, along which the said marking-bits may be laterally moved. The lower beam A is also provided with an elongated aperture, ed, along which the marking-bits B' are likewise adjusted. C designates the upright post supporting the machine, and to which the upper horizontal beam A is irmly attached. D indicates the frame to which thehorizontal beam A is secured, and by which it is operated by means of the treadle E, at the lower end of theV shaft F. The markingbits B and B are made in a rectangular form, as shown in Fig. 2, each being in two parts, which are held together by the nut and screw c, and provided with the opening e, allowing a lateral adjustment of the two parts according to the size of the mortise to be marked. The markin g-bit is held to the horizontal beam by the thiunb-screw i', by which it may be moved laterally in adjustment. The frame D is iitted about the upright post O on three sides, so that -it is moved steadilyup and down by the shaft F in operating the machine. The treadle E is supported by the rods d attached to the post O at the upper extremities.

In operation the bits B and B', being adjusted in opposition on the beams A and A', as shown in Fig. l, the sash is placed between the two rows of' edges, and the beam A being Xed the beam A is moved up by a movement of the treadle, thus bringing the edges of the bits against both sides of the sash.

Having described my invention, I claim- The arrangement of the horizontal biarsA and A', the adjustable markingbits B and B', the frame I), treadle E, and shaft F, when constructed and operating together as described.

In testimony that I claim the foregoing I have hereunto set my hand this 16th day of November, 1870.

JACOB M. RODKEY.

Witnesses:

J AMES A. C. RUFFUER, WM. R. BLACK. 

